Sequence Builder - TCP/IP Layers

🌐 TCP/IP Protocol Stack

The TCP/IP model is a four-layer framework that describes how data travels across networks. Each layer has specific responsibilities and protocols.

The Four Layers (Top to Bottom)

4. Application Layer

Closest to user. Provides network services to applications.
Protocols: HTTP, HTTPS, FTP, SMTP, DNS, POP, IMAP

3. Transport Layer

Splits data into packets, handles reliability and error checking.
Protocols: TCP (reliable), UDP (fast)

2. Network/Internet Layer

Handles addressing and routing packets across networks.
Protocols: IP, ICMP

1. Link/Data Link Layer

Physical transmission of data over network hardware.
Protocols: Ethernet, Wi-Fi, MAC addressing

Mnemonic: "All Teenagers Need Laptops"

Application → Transport → Network → Link

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